Two families joined together

I'm working on a sequel to a story I've published on wattpad and need help with the surname. The two twin daughters are Alexandria 'Sasha' Blair and Jasmine Brianna. I may have posted this once before but now the story is going in a different angle.

The mother is English and the father is Spanish with the surname, Arquilla Castillo. They end up have three children (two boys and a girl) and I need help.

I've got a few boys name in mind and wondering if you can help with what can fill this spot; _________ Roman Arquilla Castillo (boys name). The names are:

Matteo

Leandro (nn Leo)

Carlos

Cristian

Javier

Antonio

Benicio

Emilio

So what can I put in that spot. Also I'm open to new suggestions for the second boy and the girl. The first born son will be Earl Arquilla as he's the heir to his father, The Duke.